Mopar brakes compatibility question

Well, the post 73 A body UCAs use a larger ball joint, and will be needed to use the knuckles. You can stick with your LCAs, you will need the lower ball joints from the 73+ A body. Get new rotors and calipers and you should be good. There are tons of walk thru's on here.

You have the 2 required parts, the LCAs and the knuckles, for your swap. No need spending cash on the high dollar kits, you just need the last few parts.

Swapping to the post 73 discs will give you the big bolt pattern, meaning a rear end swap or at least an axle swap :)